Inner tire.



1. H. GRUBE.

INNER TIRE. APPLICTION FILED AUG.3`I 1915.

- Patented Feb. 27, 1917.

UNITED srnrns PATENT OFFICE.

JOHN H. GRUBE, or Los ANGELES, CALIFORNIA.-

lINNER TIRE.

:Specification of Letters Patent.

Application filed August 31, 1915. Serial N o. 48,198.

To all whom z' ma?) concern.'

vide an a reduced inner inflatable removable tubel and the outer casing for the purpose of protecting the former against puncture and reinforcing the latter against blowout, and' which Will also serve -to increase the Wearing quality of the outer casing..

Another object is to provide a combination inner tire and tube which is so' constructedv that it will conform tothe inner Wall of the Outer casing when the inner tube is inflated therein irrespective of irregularities, or-stretch usually present in old tires so that it Will readily fit old and distorted outer casings as Well as new, and thus overcome an objectionable feature found in in ner-linings heretofore in use. l

Another 'object is to provide an inner tire Wall'of resilient character which will form Y a .supplemental cushion interior-ly of the outer casingand thereby permit the inner tube being inflated at a greater pressure than Ordinarily employed Without destroying the shock-absorbing quality of the tire, and at the same time gaining a stronger side Wall, and fortify against rim cut.

A further object is toprovide an inner tire which is simple in construction and adaptability and economical in manufacture.

Other objects will appear hereinafter.

The invention is illustrated in the accompanying drawings in which:

Figure l, is a view in transverse section of an ordinary pneumatictire showing'the invention as applied.

Fig. 2, is a detail in perspective and secl tion illustrating the application o f' the invention.

Figs, isa detail in side elevation of the Y inner tire vwith parts broken away.

Fig. 4,' is a detail illustrating the manner of attaching the inner tire to the outer casing.

Fig. 5, is a detail iny perspectiveof'therl puncture.

vand the like pliable hook for attaching the inner tire to the casing.

In carrying out the present invention, an 'annular tube 6 constituting the body portion Patented Feb; 27, 1917.

of'an inner tire is formed of any suitable resilient Inaterial,such as' rubber, or rubber compos1t1on. This tube 1s formed With an outer surface of a shape substantlally corresponding to the shape of the inner surface Of the ordinary outer casing 7, and isdivided circumferentially on its inner Wall so thatits side portions may be separated to permit the introduction and removal of the inner tube S. Y

The outer peripheral Wall ofkthe inner 'tire is formed of considerable thickness and the side Walls gradually7 converge in crosssection from the Outer Wall to the inner mar-v ginal edges of the inner tire, asparticularly shown in Fig. 1. heavy body of resilient material opposite the tread portion of the outer casing of a This shape provides a1? thickness which, combineawah the thickf ness of the outer casing, forms a-'Wall through Which ordinary nails, tacks, pins,

and the like, cannot pass from the outer casing, thus protecting the inner tube 8 against Furthermore, the resilient outer Walls of the inner tire serve to deflect nails entering the outer casing so that where nails 'of suiicient length are pipked up they willl seldom reach the inner tu ie. y' f The thin side portions of the inner tire extend adjacent the juncture of the outer casing With thewheel vrim andwh'ile reinforcing the outer casing at this point, d o

not destroy the resiliency of the tire.

As a means for increasing the flexibility of the inner tire, at the juncture Ofthe'tread portion thereof With'its side'p'ortiom so as to prevent the side portions of the Outer casing being rendered excessivelyfrigid by theA` inner tire the latter is formed with a series of depressions 9 in its outer face. Two rows of the depressions are preferably provided and arranged in staggered .relation tol each other as shown in Fig. 3. These depressions may be spaced at any suitable distance apart and formed of such depth as to give the outer Wall 'of the inner tire the desired ilexibilityand vermit ready-vertical depression .thereof.' Tl'l reinforced opposite the depressions. 9 by e inner Wall ofthe inner tire is 110 means of fabric lining-strips 10and 141 which f extend along the inner "side, portions of the...

n'. mi

i inner tire und are spaced apart ,et their ed- .so l

tubuler ineniber divided jacent edges so es 'to perinit trnsrerse ex# pension of the inner tire when the inner tube 8 is iniieted and thus permit the inner tire being expended to AConto-rin to irreguiiirities in the outer easing: j

Mounted onl the inner wiiii of er 'the side portions of the inner tire is :i rubric dep i2 which seiits in a depression in the inner tire so iis to iie iusii 'witii the inner fece of ,the hitter. ylihis iizip is desi gned to extend over the joint between' the divided edges the inner tire when the hitter is applied and itted with the inner tub/e3 iis purtieuhiriy shown in Fig'. l. The iiup i2 being` interposed between the inner tire und the inner tubej prevents the lutter ,troni being` crowded into the joint in the inner tire., sind obvizites pinching of the inner tubo on iniizition tiureoi'u The inner tire muy be i igidiy uttziehed to the outer casing and for this purpose is ntted with u series of piizi'ie hoous ini pun ticuiariy shown in- Fig. which hooifs :ire arranged adjacent to the inner periphery oi the inner tire und ure adapted 'to be bent around und engaged with the side Hennes 15 of the outer casing :is partieuiuriy shown in Fig. 4.

l claim: l. An inner tire, comprising un :innuizir ,Cire uniierenti uiiy on its inner periphery und having inwurdiy converging side weils foi-ined with peripheraliy spaced depressions :inthe juncture of the outer weil. 'with the side i 'zi-iis, :ind anniv ier fabric reinforcing` strips on. the inner portion of the side walls arranged beck of the depressions.

2. An inner tire comprising en annular tubular member divided circumferentialHy having* inwardly on its inner yjieriphery und eonvergent side weils oi'ined witli lateral peripheriiiiy spaced depressions et thejuneture of the outer wili with the side walls;

.en inner tire confiprising` un annular reir/,ree

tubular meinber divided veireuinfei'entiniiy on its inner periphery und having inwardly convergent side Aweils formed with spaced und staggered lateral depressions zit the juncture of the' outer'ivaii with the side weiis, sind. iinnuizir .spaced reinforcing strips side walls arranged opposite the de pressions.

si. .ein inner tire comprising tubuiur i'neinber divided eireuinferentiuiiy on its inner jieriphery und having inwfirdiy convergent side weils foi-ined with eireui'nerentiiilly arranged rows of spaced depressions at the juncture oi' the outer veli with, the side Wells, :ind ineens for attaching the :inner tire to :in outer casing.

rihe combination with un outer casing :ind un inner inflatable tube of an annular tubuhir nieniber divided circuinferentiahy on inner periphery interposed between the tube and casing, having inwardly convergent side walls formed with depressions :it the j unc'ture of the side walls with the outer weil, annular iizibrie reinforcing strips on the inner ifiices of the v'side wziiis opposite the depressioni: and spaced apartu und ineens 'for removably attaching theeiiiiuiur ineinbei to the outereusiiig.

6. The combination with un outer easing und un inner inflatable tube of un an- 'nuizir tubular nieniber divided circumferentieiiy on its inner periphery interposed -between the tube und cusinghaving inwardly convergent side wziiis',formedwith depressions :it the juncture of the side wiiiis with the outer wai-li, annular fabi-ioreinforcing stripe on the inner faces of the side weils oppositethe depressions und spaced apart, and ineziiis for removably .attaching *the :in-

nuhir ineniber to the.' outer easing, compris-j ing a. series of spaced pliable hooirs carried by the side walls. 'f

an annuler auV in testiiiioii r whereof 'have sinned in f nunie to this specification...

Joi'iN n. eenen 

